[Asterisk-Users] Re: equipment configuration help
astgroups
astgroups at adelphia.net
Sat Sep 3 15:25:20 MST 2005
Erick Perez wrote:
>So, with this i solve the issue on main office. But what about the two
>remote? they are so little that they will not let me place another *
>box there. The phones will be SIP and they are like this
>INTERNET--PIX--LAN(machines and sip phones). The pixes in those two
>offices have an ipsec tunnel with the main office via internet.
>I was thinking of placing the asterisk with a public IP so the remote
>phones can NAT outside to the public asterisk located in the main
>office.
>
>What do you think?
>
>On 9/2/05, asterisk groups <astgroups at adelphia.net> wrote:
>
>
>>That is correct. Normally the layer 3 switches include advanced features
>>such as QoS but they may be available on simpler layer 2 switches.
>>
>>I think the key words to look for are 'Managed, QoS (802.1p) with
>>priority queues, VLAN, (802.1q)'...maybe even PoE if you go with some
>>SIP phones in the future that can be powered by Power Over Ethernet.
>>Something else to keep in mind.
>>
>>best of luck.
>>
>>On Thu, 2005-09-01 at 22:03 -0500, Erick Perez wrote:
>>
>>
>>>Why an L3? just for the QoS part?
>>>I checked the alliedtelesyn 8624T at $1000.00
>>>http://www.cdw.com/shop/products/default.aspx?EDC=772793
>>>
>>>but i also looked at the 8550T which has 48 port 10-100 but L2
>>>http://www.cdw.com/shop/products/default.aspx?EDC=773964&RecommendedForEDC=772793&RecoType=upsell
>>>at 900.00
>>>
>>>is the QoS different? sorry for the question but i keep reading that
>>>asterisk needs qos to function better.
>>>
>>>Thanks,
>>>
>>>On 9/1/05, asterisk groups <astgroups at adelphia.net> wrote:
>>>
>>>
>>>>Erick- Can't say if they will or not. In theory they should respect all
>>>>outgoing traffic unless being filtered by another device such as your
>>>>PIX. You might want to check with the ADSL router manufacturer just to
>>>>be safe.
>>>>
>>>>
>>>>On Thu, 2005-09-01 at 09:25 -0500, Erick Perez wrote:
>>>>
>>>>
>>>>>Do i have to change the adsl routers? or just do QoS with the Layer 3 switches?
>>>>>Will my ADSL router respect the QoS setting when sending the packet to
>>>>>the Internet?
>>>>>
>>>>>
>>>>>On 9/1/05, asterisk groups <astgroups at adelphia.net> wrote:
>>>>>
>>>>>
>>>>>>Erick,
>>>>>>
>>>>>>After reviewing your original message a little closer it occurs to me
>>>>>>that you may be able to trunk Asterisk<--->Meridian with 2 Digium TDM400
>>>>>>cards. These are Quad FXS or FXO cards that could receive the lines from
>>>>>>your 8 analog line card.
>>>>>>
>>>>>>You'll still need an E1 card (Digium or Sangoma) to terminate your PRI
>>>>>>line, but maybe with those TDM400 cards you can avoid the added cost of
>>>>>>a channel bank.
>>>>>>
>>>>>>Regarding your WAN and branch offices;
>>>>>>
>>>>>>1. I've seen comments that tunneling VoIP traffic through IPSec can add
>>>>>>overhead/delay that could impact voice quality. Something to keep in
>>>>>>mind. I have trunked Asterisk boxes in MIA,BUE,SAO, etc. but trunk with
>>>>>>IAX over the Internet not tunneled or encrypted and performance is fine.
>>>>>>
>>>>>>2. In your two locations with 15 & 50 users you should consider
>>>>>>installing Asterisk boxes in those locations and trunking them together
>>>>>>with IAX over the Internet. Perhaps go ahead and do the same thing with
>>>>>>the smaller office. You can justify a small Asterisk implementation in
>>>>>>an office with 5 phones.
>>>>>>
>>>>>>3. For QoS look for L3 managed switches that can do QoS and/or bandwidth
>>>>>>allocation. Cisco, Dell, Nortel, HP can all do this, maybe even more
>>>>>>economical D-Links. Put these behind your PIX. It is also recommended to
>>>>>>do separate VLANs for any SIP hard phones you deploy. This adds another
>>>>>>layer of security and reliability.
>>>>>>
>>>>>>Hope this helps.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>On Wed, 2005-08-31 at 21:43 -0500, Erick Perez wrote:
>>>>>>
>>>>>>
>>>>>>>-M, The norstar has no E1 card, i will have to ask the nortel provider
>>>>>>>for the cost of it and configuration prices. I might end up paying the
>>>>>>>same as the channel bank.
>>>>>>>I was also thinking of using a Citel SIP-N-NORSTAR converter but its
>>>>>>>priced at around 3k. Too expensive because its only 24 ports and i
>>>>>>>have 32 nortel phones.
>>>>>>>
>>>>>>>According to this wiki
>>>>>>>http://www.voip-info.org/tiki-index.php?page=Asterisk+Nortel
>>>>>>>"One problem with this approach is that in a Norstar system, it isn't
>>>>>>>easy to forward an extension to an outside line, which means Norstar
>>>>>>>phone users will have to remember to do something different when they
>>>>>>>want to call a user who has been switched to an IP phone for example."
>>>>>>>
>>>>>>>I guess that can be sorted out.
>>>>>>>
>>>>>>> Any manuals out there for configuration like
>>>>>>>[Telephone Company] ---E1--- [Asterisk with sangoma s102] ---T1
>>>>>>>channel bank--- [Norstar]? (only the asterisk-t1-norstar part)
>>>>>>>
>>>>>>>Now another section, networking.
>>>>>>>The 3 offices are linked via VPNs like this
>>>>>>>Internet---ADSL Router-----Cisco PIX Firewall---LAN
>>>>>>>doin ip tunneling will solve all communication problems internally,
>>>>>>>but what about QoS and SIP phones being taken to the public internet?
>>>>>>>one office has 5 users, the other 15, the other 50. ADSL Router
>>>>>>>recommendiations?
>>>>>>>and as for the phones being taken to the outside? what kind of
>>>>>>>configuration do i use? IAX is not an option.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>On 8/31/05, asterisk groups <astgroups at adelphia.net> wrote:
>>>>>>>
>>>>>>>
>>>>>>>>Erick,
>>>>>>>>
>>>>>>>>Consider trunking your Meridian to the Asterisk via an E1 card on the
>>>>>>>>Nortel. That way you'll be able to maintain your proprietary Nortel
>>>>>>>>phones and won't need a channel bank.
>>>>>>>>
>>>>>>>>Your implementation would be something like this:
>>>>>>>>
>>>>>>>>Cable & Worthless E1(or whoever)-->Asterisk(Sangoma port 1)-(Sangoma
>>>>>>>>port 2)-->Meridian--->Nortel Digital phones
>>>>>>>>
>>>>>>>>suerte,
>>>>>>>>-M
>>>>>>>>
>>>>>>>>On Wed, 2005-08-31 at 18:37 -0500, Erick Perez wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>>>Update to myself:
>>>>>>>>>So in terms of equipment I will need:
>>>>>>>>>Sangoma a102 E1 (two E1 ports) plus a E1 crossover cable
>>>>>>>>>a channel bank with 8 FXS ports
>>>>>>>>>
>>>>>>>>>sounds expensive for just 8 analog ports. Any ideas?
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>On 8/31/05, Erick Perez <eaperezh at gmail.com> wrote:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>>Hi, Im about to start shopping parts for an * box. We are migrating
>>>>>>>>>>from a Meridian Norstar+ Modular ICS
>>>>>>>>>>
>>>>>>>>>>Here are the customer details:
>>>>>>>>>>a) Meridian with 8 analog lines card and 32 nortel digital phones and
>>>>>>>>>>voicemail. We will interface * to the meridian using the analog ports
>>>>>>>>>>so we dont loose the phones.
>>>>>>>>>>
>>>>>>>>>>b)half E1. The * box will get half E1 (with DID) for connecting to the
>>>>>>>>>>local telco.
>>>>>>>>>>We need two recepcionist/operator phones (sip or whatever)
>>>>>>>>>>
>>>>>>>>>>So in terms of equipment I will need:
>>>>>>>>>>Sangoma a101 E1/PCI
>>>>>>>>>>an 8 port analog card
>>>>>>>>>>a channel bank?
>>>>>>>>>>
>>>>>>>>>>Can someone tell me if i really have to buy an analog card? or maybe
>>>>>>>>>>link me to a web site that explains (with images) how a t1/e1 is
>>>>>>>>>>managed?
>>>>>>>>>>
>>>>>>>>>>Thanks, and I apologize for this completely newbie question. I've
>>>>>>>>>>never seen images or instructions on how to handle this. Im not even
>>>>>>>>>>sure im using the right terms in Google.
>>>>>>>>>>
>>>>>>>>>>--
>>>>>>>>>>
>>>>>>>>>>-------------------------------------------
>>>>>>>>>>Erick Perez
>>>>>>>>>>Linux User 376588
>>>>>>>>>>http://counter.li.org/ (Get counted!!!)
>>>>>>>>>>Panama, Republic of Panama
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
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>>>>>>>>
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>>>>>>>>
>>>>>>>>
>>>>>>>--
>>>>>>>
>>>>>>>-------------------------------------------
>>>>>>>Erick Perez
>>>>>>>Linux User 376588
>>>>>>>http://counter.li.org/ (Get counted!!!)
>>>>>>>Panama, Republic of Panama
>>>>>>>_______________________________________________
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>>>>>>>
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>>>>>>
>>>>>>
>>>>>
>>>>>
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>>>>
>>>>
>>>
>>>
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>>
>>
>
>
>
>
Why don't you go ahead and try it through your IPSec tunnel and if there
is a quality issue do as you suggest, place the Asterisk on a public IP,
secure it as much as possible through standard Linux tools and
recommendations and point your SIP clients to it. That should work no
problem.
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